Download SERVICE MANUAL

CUSTOMER ____________________________________________
TAG No. ________________________________________________
P.O. No. ________________________________________________
ROTOSTAT MIXER MODEL ________________________________
ADMIX JOB No. __________________________________________
SERIAL No. _____________________________________________
DATE ___________________________________________________
SERVICE
MANUAL
TABLE OF CONTENTS
Section
Page No.
Section
Page No.
SECTION 1
SECTION 8
UNCRATING & INSPECTION ............................................... 3
CLEANING ............................................................................ 9
SECTION 2
SECTION 9
INSTALLATION & PRE-OPERATION CHECKOUT .............. 3
BEFORE STARTING THE MIXER! ....................................... 3
MIXER POSITIONING .......................................................... 3
MAINTENANCE .................................................................... 9
SECTION 10
LUBRICATION ...................................................................... 9
SECTION 3
MOTOR CONNECTIONS AND WIRING ............................... 4
SECTION 11
SECTION 4
DISASSEMBLY & REASSEMBLY OF
BEARING STAND ............................................................... 10
ASSEMBLING MIXER SHAFT COUPLING .......................... 4
SECTION 12
SECTION 5
SHAFT STRAIGHTENING PROCEDURE ............................ 5
OPTIONAL SEAL PLATE REMOVAL ................................. 12
OPTIONAL SEAL PLATE INSTALLATION ......................... 12
SECTION 6
SECTION 13
DISMANTLlNG MIXER HEAD ............................................... 6
REASSEMBLlNG MIXER HEAD ........................................... 6
REPLACING WORN BUSHINGS .......................................... 6
REPLACING USDA PARTS .................................................. 8
HOW TO MONITOR BUSHING WEAR ................................. 8
OPTIONAL JETFOIL™ ....................................................... 13
SECTION 14
PARTS LIST ........................................................................ 14
SECTION 15
SECTION 7
OPERATING THE MIXER ..................................................... 9
MAINTENANCE AND
TROUBLESHOOTlNG CHECKLIST ................................... 15
GENERAL
INFORMATION
With proper care this ROTOSTAT Mixer will give years of trouble-free service. If you should have any
questions regarding its operation which are not answered in this manual, call the Admix factory at:
1-800-466-2369
CAUTION
The mixing head must not be run without being submerged in liquid. It must be entirely below liquid
level during rotation. If it runs dry---or partly dry---the stator bushings, the washers and the rotor shaft
will be exposed to excessive wear.
CAUTION
Prior to connecting the electric motor to the power supply, remove the prop and the mixing head! (See
instructions) If the mixer shaft is threaded and the direction of rotation is wrong, the rotation of the drive
unit might unscrew the mixer prop which could cause damage to the prop or vessel. THE PROPER
ROTATION IS CLOCKWISE, WHEN SEEN FROM ABOVE, indicated by the arrow on the bearing
stand.
page 2
SECTION 1
UNCRATING & INSPECTION
1-1 After uncrating your mixer, check for shipping damage and report any damage immediately to the carrier and to
ADMIX. Please make sure that all parts are accounted for.
1-2 The mixer is normally shipped totally preassembled if in-tank couplings are not used. If the unit has a coupling,
the shaft may be in a separate container. Do not remove protective wrappings, if the mixer is to be stored
before it is placed in operation. Store the mixer in a clean, dry location.
SECTION 2
INSTALLATION & PRE-OPERATING CHECKOUT
2-1 Moving & mounting mixer
• Lift mixing unit from the BEARING STAND ONLY. DO NOT LIFT
OR CARRY FROM THE SHAFT as this could cause the shaft to
bend and may lead to excessive vibration or damage.
• Mixer may be installed vertically or slightly inclined (5-10 degrees)
for proper operation.
• If clamp mounted, be sure the clamp is secured to the vessel and
mixer properly.
• The ROTOSTAT Mixer MUST BE FIXED SECURELY TO A
MOUNTING PLATE OR FLANGE, and cannot be suspended on
hooks or straps or any other non-fixed device.
Mixing
Head
Assembly
Rotation
STATOR broke
away to view
ROTOR
BEFORE STARTING THE MIXER
2-2 Rotation, & Check list
• Check the rotation of the ROTOR within the STATOR. Rotation
direction arrows pointing clockwise must be visible from above!
• Check to insure that the STATOR rotates freely, separate from
the shaft by holding the shaft and spinning the STATOR by hand.
• Run through the complete check list on page 15 before starting
mixer
STATOR
ROTOR
See illustration
3 or 4 for
more details
MIXER POSITIONING
2-3 For liquid-liquid, non-vortex conditions
• The ROTOSTAT mixer will operate satisfactorily in most cylindrical vessels, with full hemispherical bottoms
providing the best flow pattern. Vessels can also be conical or dished. Vessels should be selected with the
smallest diameter and greatest depth provided that shaft length limits are not exceeded.
• The best mixing is obtained at vertical, off-center positioning, from approximately 3 to 4 inches off-center to ¼ of
the tank diameter (from the tank wall) in larger vessels. Where permissible, baffles are recommended in the
vicinity of the mixing head, or up to normal operating level. Either 2 or 4 Baffles are advised, with a width of T÷12,
and
mounted a distance of T÷72 off the tank wall (where T= Tank diameter).
2-4 For liquid-solid, vortex conditions
• If vortex is required (for instance, to draw down light, powdered materials), place the mixing head in the center
of the vessel, vertically or slightly inclined, without baffles.
• The VORTEX SHOULD NEVER BE SO BIG THAT THE MIXING HEAD RUNS DRY OR PARTLY DRY. Should
the vortex extend to the head, move the mixing head a few inches off vessel center and the stator bushings will
be lubricated by the mixing medium. By this means, cavitation, and thereby heavy wear is avoided.
2-5 Mixing head location
• The recommended location of the mixing head is approximately ½ of the Rotor diameter (or 3 to 4 inches off
bottom) for Models X. Model XP, with the lower propeller should be 1 prop diameter off bottom.
• When a stronger vortex is required, the mixing head may be installed as high on the turned down portion of the
shaft as possible, provided the head is not directly center mounted and the vortex does not extend down to the
rotor/stator.
page 3
SECTION 3
MOTOR CONNECTIONS AND WIRING
CAUTION
Motor must be installed in accordance with NEMA and all applicable federal state and
local electrical codes.
Interlocks should be installed on all personnel access stations to prevent injury during
internal tank maintenance.
3-1 Prior to connecting the motor and checking the direction of rotation, remove the mixing head and Prop from
the shaft. (See instructions)
Connect via an overload protection device and check the direction or rotation which must be clockwise, seen from
above (indicated by the arrow on the bearing casing). When the mixing head is remounted - Do not start the mixer
unless the mixing head is submerged in liquid.
SECTION 4
ASSEMBLING MIXER SHAFT COUPLING
4-1 IMPORTANT - If the shaft has been shipped NOT attached to the mixer, the shaft has bolted coupling halves.
Please carefully review the following procedures before installing or assembling the shaft:
• IMPORTANT - Before bolting coupling halves together, be certain to align
the match marks on each half. The shaft has been straightened to provide
minimal shaft run out when match marks are aligned.
• Make sure that the shaft coupling bolts (#1) and retaining bolt
(#4) are tight and that the spring washers (#2) and retaining plate
(#3) are in place PRIOR TO STARTING THE MIXER BEFORE
EACH AND EVERY USE.
1
• Bolted couplings are furnished with the proper number and size
of bolts. Tighten with standard torque procedures making sure that
the registers on each half provide a tight connection. The upper coupling
half (#6) is a tapered design with a retaining plate (#3) and bolt (#4) to insure
absolute alignment and prevent loosening (see illustration #1). The lower
coupling half (#5) is welded directly to the shaft and does not require adjusting.
6
4-2 Reassembly of tapered half couplings.
• Should it be necessary to remove the tapered upper coupling half, it will
be necessary to EXERCISE EXTREME CARE ON REASSEMBLlNG THE
COUPLING. It is advisable that a substance such as blueing be applied
to check the accuracy of the taper fit. It must be completely seated to
allow realignment of the shaft. BLUEING MUST BE REMOVED PRIOR 2
TO FINAL ASSEMBLY.
• After the two coupling halves are aligned and rebolted, it is necessary to
check the shaft run out to insure that the TIR (Total Indicator Runout) does
not exceed .004" at any point along the shaft.
page 4
3
4
5
ILLUSTRATION
No. 1
MIXER COUPLING
SECTION 5
NOTE: All mixers are shipped with shafts straightened to less than .004”
runout. Should the shaft develop excessive runout, vibration or wobble
from wear and tear, the shaft may be straightened by the following
dure:
proce-
SHAFT STRAIGHTENING PROCEDURE (see illustration #2)
5-1 Mount ROTOSTAT so that the shaft is in the vertical position and free to rotate by hand.
5-2 Clamp dial indicator to a rigid support that can be slid up and down the length of the shaft in 8"-12" increments.
5-3 For 2 F/D Coupled Shafts Only: Remove shaft and lower coupling half. Indicate the face of the upper coupling
half, this face must be perpendicular with drive shaft to within .002" before continuing with shaft straightening.
5-4 For 2 F/D Shafts Only: Reinstall shaft and lower coupling half in each of the four (4) possible positions indicating on the lower end of the shaft in each position. Install bolts and torque in the position having the least
amount of runout.
5-5 For 2 F/F and 2 F/D Shafts: Indicate shaft at a point 8"-12" from lower flange*. Mark this point “A”. Rotate
shaft to find the point having the greatest amount of runout. Mark this point with a vertical mark. If the runout at
this point is .004" or less, go to step #5-6. If it is more than .004", go to step #5-5A.
*On 2 F/F units or from coupling on 2 F/D.
5-5A With a pinpoint, high heat flame, heat a point 180º from the vertical line and as close to couplings (on 2
F/D units) or flange (on 2 F/F units) as possible without burning the v-ring or seal. Heating point should
be no larger than 1/4" diameter. Shaft diameter will determine the amount of time the flame will be held
on the shaft.
-On shafts ranging from 1" - 1½”, 3-5 seconds will normally pull .005-.010" out of the bend.
5-5B After heating, immediately quench only the heated spot with an ice cold wet rag. Cool the rag off every
15-30 seconds and continue to hold on heated spot until all heat has been pulled from shaft. Too much
heat will yield inconsistent results.
5-5C Rotate shaft to recheck runout at point “A”. If runout is still over .004", repeat steps 5-5, 5-5A and 5-5B
1" closer to point “A” from last heating point. Continue repeating these steps until runout is .004" or less.
5-6 Move indicator to a point 8"-12" from point “A”, label this point “B”. Rotate shaft to check runout at point “B”.
Point “A” is now the point to apply heat. Repeat steps 5-5A, 5-5B and 5-5C until runout at point “B” is a maximum of .004".
5-7 Continue moving down the shaft through points “C”, “D”, “E”, etc. until there is no point on the shaft with runout
any greater than .004".
point
point
A
point
B
C
point
point
ILLUSTRATION
No. 2
E
D
point
If indicator reads more than .004” at this point, place heat
180 deg. from high point and to point A.
F
page 5
SECTION 6
DISMANTLlNG MIXING HEAD
STYLE XP AND X
Review illustration #3 before proceeding.
6-1 If the unit has a propeller (XP models), twist the prop counterclockwise to unthread.
6-2 Loosen screw (hex head on USDA units, socket head on non-USDA units) in the lower stop collar (#1) and
pull the lower sleeve (#2) and lower washer (#3) off the shaft. Loosen the screw (hex head on USDA units,
socket head on non-USDA units) in the rotor (#5) and upper collar (#10). All of the components should now
easily slide off. Upper and lower sets of stop collars, washers and sleeves are identical and may be interchanged. Occasionally, a rotor or collar may gall on the shaft. Tap the component with a mallet until the parts
moves freely. DO NOT USE EXCESSIVE FORCE IN REMOVING THE PARTS!
REASSEMBLlNG MIXING HEAD
STYLE XP AND X
6-2 Place upper stop collar (#10) upper sleeve (#9) and upper washer (#8) on the mixer shaft. Insert rotor (#5)
in stator (#6). Place stator (with bushings installed) and rotor on the mixer shaft with the arrow embossed on
the rotor pointing to the direction of rotation. Place lower washer (#3) lower sleeve (#2) and lower stop collar
(#1) on the shaft. Tighten the lower stop collar to prevent the mixing head from dropping. Place rotor (#5) in
desired position on the shaft and tighten screw(s) (hex head on USDA units, socket head on non-USDA units)
securely. (In order to give access to screws, you may move the stator a little upwards). Undo the lower stop
collar (#1) and adjust the position of the stator so that the rotor is positioned inside the slotted stator rim.
Tighten the lower stop collar screw securely. Position the upper stop collar (#10) 1 to 3 mm above the upper
sleeve (#9) and tighten securely. It is very important for the stator to be able to revolve absolutely freely on the
shaft. If the upper washer, sleeve and collar are too close to the top of the stator, the stator may not be able to
revolve freely and the motor may become overloaded. Rethread the prop if style XP.
REPLACING WORN OR DAMAGED BUSHINGS
STYLE XP AND X
6-3 Bushing wear should be checked after every 100 hours of service or once per month, minimum. As the
bushings, shaft or shaft wear sleeve show any deterioration, we recommend immediate replacement of the
bushings (and possibly the wear sleeve if supplied with one). Bushings are available in Teflon, Rulon, Bronze,
or stainless reinforced Teflon. Ceramic bushings have integral washers and will therefore appear different (see
illustration #3).
6-4 When replacing Bronze, Teflon, Rulon or stainless steel reinforced Teflon, the new bushing can be easily
press fit into the stator. Ceramic bushings require an interference fit of .001" to .0015". This is best accomplished by heating an oil bath to 400°F and dropping in the stator for 10 to 20 seconds. Upon removing the
stator from the bath, the bushing should now be easily pressed into the stator. DO NOT HAMMER OR POUND
THE BUSHING INTO THE STATOR as this will surely damage or destroy the bushing.
page 6
10
9
8
XP Heads
only
7
6
5
4
11
3
2
1
XP Heads
only
SPECIAL SLEEVE
DESIGN FOR CERAMIC
OR OTHER
HARDENED SURFACE
MATERIAL
STANDARD X AND XP MIXING
HEADS WITH 316SS SLEEVE
ILLUSTRATION
No. 3
page 7
XP Heads
only
REPLACING USDA PARTS
6-5 If the ROTOSTAT is supplied in a USDA approved version, the
bushings, washers and hardware are different from the standard model.
All USDA models feature Rulon or PTFE bushings with an
integral washer (see item #1 on illustration #4).
The hardware to install the rotor and the
stator collars are supplied with hex head
3
bolts (#2) with Teflon washers (#3) to seal
the threads (see illustration).
When disassembling or reassembling
the USDA mixing head be
sure to utilize only the integral
bushing/washer components
2
and the hex bolts with Teflon
seals. Non food-grade materials and or set screws are
strictly prohibited by the USDA.
1
4
5
7
ILLUSTRATION
No. 4
USDA MODIFICATIONS
3
6
4
8
2
3
1
9
XP Heads
only
HOW TO MONITOR BUSHING AND SLEEVE WEAR
6-6 The initial gap or clearance between the rotor and stator can vary from .020 to 040. We recommend the
use of a feeler gauge to check the initial gap between the rotor and stator. As the bushing (or wear sleeve)
wears the gap will increase. The gap should not be allowed to go beyond .080", as this could cause the
bushing and mixing head to fail. The feeler gauge should be used to insure problem-free operation.
page 8
SECTION 7
OPERATING THE MIXER
7-1 ROTOSTAT Mixers are designed to operate intermittently under all standard conditions and at normal levels.
It is not good practice, however, to operate continuously when extreme vortexing or surging occur.
All high speed mixers operate at high temperatures and therefore may feel hot to touch.
(Max. bearing frame temp.: 160°F)
7-2 After mixer has been securely fastened in position and a check of Mixing Head rotation and clearance has
been achieved, mixer is ready for operation.
7-3 Turn on the mixer. Allow time enough for the mixing pattern to be established, then make any required
adjustment of baffles.
7-4 At the end of two weeks service, check all mounting screws for tightness.
SECTION 8
CLEANING
Clean the mixing head after use by letting it spin a few minutes in hot water or a suitable cleaning solution.
Remnants of dried material may cause blocking of the stator which will result in overload of the motor, so
proper cleaning should always be carried out immediately after use.
SECTION 9
MAINTENANCE
The condition of the stator bushings and washers should be regularly checked. The easiest way to check the stator
bushings is to grasp one of the stator blades and check if any considerable radial slackness can be verified. If slackness occurs, the stator bushings should be replaced as soon as possible, and in any case, before the slackness
becomes so critical that the high speed rotor could touch the stator rim. (See section 6-6)
LUBRICATION
SECTION 10
____ Required (Only on large mixers)
____ Not Required (Most models are supplied with sealed, pre-packed bearings)
Lubrication of the high speed bearings is generally not required. If necessary, please proceed as below:
The two ball bearings inside the bearing case should be lubricated with heat proof, high pressure lubrication grease
after every 500 hours operation.
Quantity of grease: about 1.7 fluid ounces (50 cm3) for each bearing.
page 9
SECTION 11
DISASSEMBLY &
REASSEMBLY OF
THE BEARINGSTAND
1
See illustration #5
2
11-1 Remove the Coupling Half, V
Ring and Stainless Cladding
If the shaft has couplings, the upper
coupling is removable and can be
disassembled by following instructions
within section 4. After removal of the
coupling half, slide the rubber V ring
(#18) down off the shaft. The stainless cladding (#15) will pop off. Save
both the V ring and cladding for
reassembly.
6
4
3
5
11-2 Remove the motor.
Remove the 4 bolts (or 8 on large
units) at the motor flange. If the motor
will not readily separate from the
motor flange (due to a seized key,
coupling or rust), we recommend
inserting a wedge between the motor
flange and bearing stand to pry them
separate. Alternately, the motor may
be driven out by inserting long undersized bolts in the threads and tapping
on them, being careful not to damage
the threads or the bolts.
9
7
10
8
11
12
11-3 Remove the upper snap rings.
There are two (2) snap rings on the
upper bearing stand (see illustration)
one on the O.D. of the coupling (#6)
and one on the I.D. of the bearing
stand (#4). Remove both. Larger
units may have a bearing cover
which must be removed prior to
pulling the snap rings.
13
15
14
16
17
18
19
ILLUSTRATION
No. 5
BEARING STAND
page 10
Double bearings on
size 200 & larger
frames
11-4 Drive the shaft out.
Place the mixer horizontally on a bench or on the floor. With the coupling removed below the mounting flange, it
should be possible to tap the shaft out of the motor side from the bottom. Place a wood block or other device
over the shaft to protect - tapping the shaft directly could cause run out problems if kinked. In order to not bend
the shaft, it is important that you swing the hammer completely parallel with the shaft and hit the center of the
shaft end only. One or two blows should be sufficient to loosen the shaft - followed by several taps to finish
driving the shaft out.
The upper bearing (#5) will pop out as the shaft slides out of the bearing stand. The motor coupling (#7) will
also come out with the snap ring (#3) below the bearing still attached to it. This snap ring (#3) may need
replacing if damaged. The lower bearing (#12) will remain in place in the bearing stand.
11-5 Remove the Lower Bearings
Remove the radial seal (#17) and seal ring (#16). Remove the snap ring (#13) to expose the bearing and
retaining ring. The lower bearing can now be removed from the bottom by using a long drift or rod to drive out
from the top end.
11-6 Reassembly.
Reassemble the bearing stand in reverse order. Be sure that all internal surfaces in the bearing stand are
cleaned prior to reassembly. Be sure to apply a generous amount of grease between the lower bearing and the
seal to insure lubrication. It may be necessary to apply Loctite or a similar compound at the bearing to prevent
movement. The seal ring (#16) may also require a sealant to hold it in place. The seal ring is either stainless
steel with o’rings or PVC.
Continue reinstallation of the upper bearing, snap rings and motor as above.
page 11
SECTION 12
OPTIONAL SEAL PLATE
SEAL PLATE REMOVAL (See illustration #6)
12-1
12-2
12-3
12-4
Carefully remove mixer assembly from tank.
Remove mixing head, from lower shaft - see section 6
Remove lower shaft from mixing unit & tapered bore upper coupling half (2F/D model only)- see section 4
Check shaft (#4) for surface marks that could damage seal lip (#1) during removal, and remove burrs, clean as
needed, and apply a light lubrication film on shaft to aid seal removal.
12-5 Remove seal plate mounting bolts (# 5). and carefully slide seal plate (#2) off shaft.
12-6 Inspect seal (#1) for wear and or damage, and replace if required.
Item #3, Bearing frame
ILLUSTRATION
No. 6
Item #5, Hex head bolts
Item #1
Item #2, Seal plate/Mounting flange
Item #1, Seal mounting position B
Seal mounting position A
(CIP seal)
(back-up grease seal)
Item #4, Mixer
output shaft
Standard seal plate shown. - Optional 150 lb. ASME flange or Tri-Clamp flange may also be used.
SEAL PLATE INSTALLATION (See illustration #6)
12-7 Complete steps 12-1 through 12-3 for new SEAL PLATE assembly installation. For replacing worn seal only:
make note of old seal (#1) position in flange (Position A or Position B), and install new seal (#1) in the same
position.
12-8 Check shaft (#4) for surface marks that could damage seal lip (#1) during installation, and remove burs, clean
as needed, and apply a light lubrication film on shaft to aid seal installation.
12-9 Carefully slide seal plate (#2) on shaft.
12-10 Position the seal plate (#2) on the mixer bearing frame (#3) mounting flange, and carefully center it
relative to the seal (#1) and shaft (#4) to within .005” T.I.R.
12-11 Install seal plate mounting bolts (# 5), and recheck seal for position (per 12-10) after bolts (#5) have been
tightened.
12-12 Reinstall lower shaft (2F/D models only) - see section 4. Check shaft straightness - see section 5. Reinstall
mixing head - see section 6 and review sections 7, & 9.
page 12
SECTION 13
OPTIONAL JETFOIL™ IMPELLER
JETFOIL™ MOUNTING (See illustration #7)
13-1 The JETFOIL™ (#1) must not be mounted upside-down. See illustration
#7 for proper orientation.
13-2 The JETFOIL™ (#1) should be located 6 to 8 inches below liquid level.
13-3 After positioning the JETFOIL™ (#1) on the shaft (#2) tighten the two set
screws (hex head bolts with Teflon washers on USDA models) (#3).
ILLUSTRATION
No. 7
Liquid level
6” to 8”
Item #2, Mixer
output shaft
Item #1, JETFOIL™
Item #3,
Set Screws, (2)
Adjustable
Standard JETFOIL™ mounting position.
page 13
PLEASE CALL 1-800-466-2369 TO ORDER PARTS OR
RECEIVE A CURRENT PRICED PARTS LIST VIA FAX.
SECTION 14
TYPICAL PARTS LIST
• All Rotostat Models utilize the components listed.
• Current priced parts lists are sent under separate cover
within one week of shipment.
• These parts lists shown here may be used as a guide.
Reference numbers relate to the illustrations in this
manual only.
Note: Mixing Head Components may be Slightly
Different with Special Designs
Non-USDA X & XP Mixing Head Parts - illustration #3
REF.
NO.
DESCRIPTION
DETACHABLE SHAFT COUPLING - illustration #1
REF.
NO.
DESCRIPTION
Qty.
per Unit
Recommend
for Stock
1
Coupling Bolts
4
--
2
Spring Washers
4
--
3
Retaining Plate
1
--
4
Retaining Bolt
1
--
Qty. per
Unit
Recommend
for Stock
5
Lower Welded Coupling
1
--
6
Upper Taper Bore Removable Coupling
1
--
1
Lower Stop Collar with Screw
1
--
2
Lower Wear Sleeve
1
1
3
Lower Washer
1
1
REF.
NO.
4
Lower Bushing
1
1
1
5
Rotor with Screw
1
--
6
Stator
1
7
Upper Bushing
8
BEARING STAND PARTS - illustration #5
Qty. per
Unit
Recommend
for Stock
Motor
1
--
2
Key for Motor
1
--
--
3
Snap Ring (Below Upper Bearing)
1
1
1
1
4
Snap Ring (Above Upper Bearing)
1
1
Upper Washer
1
1
5
Upper Bearing (Double Bearing on 200
Frame and Larger)
1(2)
1
9
Upper Wear Sleeve
1
1
6
Snap Ring / Motor Coupling
1
1
10
Upper Stop Collar with Screw
1
--
7
Motor Coupling
1
--
11
Lower Detachable Prop
1
--
8
Bearing Stand Housing
1
--
USDA X & XP Mixing Head Parts - illustration #4
9
Pin
1
--
REF.
NO.
DESCRIPTION
DESCRIPTION
Qty. per
Unit
Recommend
for Stock
10
Drive Shaft
1
-
1
Upper & Lower Stop Collars
2
--
11
Bearing Ring
1
--
2
Hex Head Bolt (For Stop Collars)
2
--
12
Lower Bearing
1
1
3
Teflon Washer / O-ring
4
2
13
Snap Ring (Below Lower Bearing)
1
1
4
USDA Rulon or Teflon Bushing /
Washer
2
2
14
Dismantling Screw (Not on All Units)
1
--
5
USDA Rotor
1
--
15
Flange Cover (SS)
1
--
6
Stator
1
--
16
O'Ring
1
1
7
Hex Head Bolt (For Rotor)
2
--
17
Radial Shaft Seal
1
1
8
Teflon Washer (To Seal Prop Thread)
1
1
18
V-Ring Excluder
1
1
9
J-Style Prop
1
--
19
Seal Retainer (SS)
1
1
page 14
SECTION 15
MAINTENANCE AND
TROUBLESHOOTING CHECKLIST
Before starting mixer check the following:
1. Mixing head is submerged. ...........................................................................
_____
2. Rotation of shaft is clockwise when viewed from above. ..............................
_____
5. Baffles are installed as recommended. (If required) .....................................
_____
6. If shaft is coupled, coupling halves are installed with
match marks aligned.....................................................................................
_____
7. All hardware on couplings is tightened, washers are in place. .....................
_____
8. Initial gap between rotor and stator checked with feeler gauge and
recorded here: _________ ...........................................................................
_____
9. Bolts securing rotor and stator collars checked for tightness. .......................
_____
10. Check run out to insure that it does not exceed .004" at any point. ..............
_____
Check during operation:
1. Mixer is not vibrating on mounting stand. .....................................................
_____
2. Shaft is turning smoothly without warble or deflection. .................................
_____
3. Bearings are quiet and bearing stand is warm to the touch - NOT
excessively hot (over 150°F). .......................................................................
_____
4. All hardware checked for tightness periodically. ...........................................
_____
5. Gap between bushing and stator monitored for wear periodically. ...............
_____
6. Liquid in vessel is not exhibiting extreme vortexing, i.e., the head
is still submerged. .........................................................................................
_____
page 15